Beating or grinding of paper-pulp.



E. PARTHJG UN.

HEATING 0R GRINDING OF PAPER PULP,

APPLICATION FILED MAR. 23.1918.

172v: n tor E. PARTINGTON.

HEATING 0R GRiNDING OF PAPER PULP. APPLicAnon men mmza. ms.

1 ,277,637. Patented Sept. 3, 1918.

2 SHEETS-SHEET 2- Inventor M 0W Bf Z133 Attorney:

To all whom it may concern:

UNITED STATES PATENT OFFICE.

EDUABD rnn'rmoron, OF WES'IWOOD PARK, ENGLAND.

IBEA'IING OB GRINDING OF PAPER-PULP.

Specification of Letters Patent.

Patented Sept-,3, 1918.

Application ma March as, me, Serial No. 224,311.

Be it known that I, EDUARD PARTINGTON a subject of the King of Great Britain an Ireland, and a resident of lVestwood 'Park, in the county of Worcester, En land, have invented certain new and usefu Im rovemeuts in the Beating or Grinding of aper- Pulp, of which the following is a specification.

This invention relates to the heating or grinding of paper pulp in Hollander beatmg engines.

n the pulping of materials of papermaking in Hollander beating engines, the material to be pulped is enerally fed into the vat of the engines and acted on therein until it is reduced or pulped to the retpl ired extent when the'pulp is'discharged. hus, there is an intermittent discharge or delivery of pulp from the engine. 1

The ob'ect of the present invention is to provide or a continuous and regular disglue or engines or two or more engines in engine adapted for carryingout t charge or delivery of pulp from one or more Hollander or beating engines.

According to this invention, the material to be pulped is fed into a Hollander engine and beaten therein until the pulp reaches a redetermined level when further material is fed in and a corresponding quantity of pulp discharged from the en' ine by displacement with or without t e aid -of a.

Epmp'. In some cases, I ma employ a numr of engines, feed material to be pul ed to one or more of the engines, disp ace partly beaten pulp therefrom to another en- 'succession and displace beaten pulp from such engine or engines or the last of them.

In the accompanying drawings, Figures 1 and 2 are, respectively, a more or less diagrammatic elevation and a plan, the former partly in section, of a single pulp-beating tion. and ig. 3 is a diagrammatic plan of four engines ada ted therefor.

Referringfirst to i 1 and 2, a is the vat of theengine, b th mid-feather, and a the beating roll. At the rear end of the 'vat a there is provided at a suitable level in the wall thereof, an overflow outlet d. At the commencement of o erations,

material is fed into the vat a, and eaten or the vet and as this material is beaten by pul ed therein by the roll 0 until the level f 3N3 pul flow d. urther, material is then fed into e invenbehind the .roll rises to the overthe roll there is a corresponding discharge or displacement of ul through the overflow d. The level 0 .t e pulp is, of course, highest behind the roll 0 and there is a gradual fall in level from behind the roll to the front thereof. If the pulp in the vet a is of a fairly thick consistency, it will be.

spread across the vat to the Wallb- (about the point indicated by the letter V X in Fig. 2) so that as the nip circulates in the vat, there is" a radua displacement toward the wall, as in icated by the line Z in Fig.2, and the material fed in passes several times beneath the 'roll 0 before being displaced through the outlet d. The pointsbf feeding and dischar e may be reversed and in such cases the ischarge will be effected by a pump, the suction pipe of which will be arranged at the normal level of the pul at the point of discharge so that pulp can lie drawn oil only'when there is a displacement of pulp from the wall of vat to the mid-feather by the feedin material pulp wil 1 be adjusted to the displacement caused by the rate of feeding.

The material may be fed into the vat by.

an overhead pipe or chute, or by hand, or many other ap ropriate manner.

In carrying t is invention into effect with a lurality of beating engines, the materia to be pulped may be fed to the first engine and acted upon in each engine in sucoession, the finished pulp being discharged from the last engine. In the exam 1e illustrated in Fig. 3, the material is fe into the vat of the first engine, and (partially beaten pulp displaced by continue feeding passes the overflow d to the second en me 2.

rom the engine 2 pulp is withdrawn by a pum e and delivered into the t 'ird engine 3 an from this engine pulp ove owe to the last engine 4, from which finished pulp is discharged,.preferably b means of a pump, from about the point in icated by the letter Y. Thus, there is a constant feed of mate rial into the first engine and a continuous the or the suction or discharge o the discharge of finished pulp from the last en no.

t will be observed that in engines 1 and 3, the feed is near the mid-feather and the discharge aft the wall of the vat while in engines 2 and 4 the feed or inlet is at the Wall of the vat and the discharge from near the mid-feather. In each case, therefore, the material or ulp must pass under and be acted upon by the beating roll 0 several times before it spreads across to the pomt of dischar e.

As will e obvious, the arrangement is capable of considerable modification. For example, partially beaten pulp may be displaced or discharged from engine 2 to engines 3 and 4, and finished pulp taken from each of the latter engines, or material may be fed to both engines 1 and 2 and partially beaten pulp displaced or discharged from these two engines to engine 8. p In addition to providing a constant discharge or delivery of pa p, the invention also enables a better mixed and more un formly beaten pulp to be obtained than is obtained from beating engines operating in the usual way;

What I claim as m invention and desire to secure by Letters atent, is

1. The process of grinding or beating pul for paper-making which consists in fee ing material to be pulped into a H0llander beating engine and beating same therein until the pulp reaches a predetermined level, then feeding further material into the engine and simultaneously dis-i charging a corresponding quantity of beaten pulp from the latter by displacement with, if necessary, the aid of a ump.

2. The process of grinding or beating pul for paper-making which consists in fee ing material to be pulped into one or more of a dplurality of Hollander beating engines an beating same until the pulp reaches a predetermined level, then feeding further material into the said'engine or 'enines and simultaneously discharging partly eaten pulpl from each engine of the plurality to t e next in succession and discharging beaten pulp from the last engine.

In witness whereof I have hereunto set my hand.

'EDUA'RD PARTINGTON.

It is hereby certified that the name of the patentee in Letters Patent No.

1,277,637; granted September 3, 1918, for an improvement in "Beating or Grioding of Paper-Pulp" was erroneously written and printed as "Eduard lm-tinglon,"

whereas said name should have been written and printed as Edwxrd Parting ton:

and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Oflice. I

Sined and sealed this we, day of October, A. 1)., 191s.

[SEAL] R. F. WHITEIIEAD,

Acting Cmnmt'uiamr of Patents. 

